Signor to george westinghouse



(No Model.)

W. STANLEY, Jr.

INDUCTION COIL.

No. 349,616. Patented Sept. 21, 1886.

375 al i o-z may Nv PETERS, Pbolo-Liflvogrnphcr, Walhingtarn D. c.

UNITED STATES XVILLTAM [\TAXLEY, JR, OF GREAT PATENT OFFICE.

BARRlNlTON, illAQSACHUSETTS, AS-

INDUCTION-COIL.

E-PEGIFICATION forming part of Letters Patent No. 349,616, dated September 21, 1886.

Application tiled February 10, lr'ifi.

T0 (LZZ whom it may concern.-

Be it known that I, \VtLTlt'AN S'IANLEY, Jr.. a citizen of the United States, residing in Gre t 'Barrington, in the county of Berkshire and 5 State of lilassachusetts, have invented certainnew and useful Improvements in lnduction- (toils, of which the following is a specification.

The invention relates to the class of electrical apparatus employed for transforming electric currents of a given character into currents of different form.

' In the conversion of electrical energy from currents of a lower to higher potential, and "vice versa, by means of in duction-coils, it is desirable that the quantity of iron acted upon by the currents in the primary circuit, and in turn reacting upon the coils in the secondary circuit, should be as great as possible, and

that the iron itself should be divided into thin lainimr orplatcs, rather than united in a solid mass, and it is also desirable that the parts he so organized as to render the construction of the coil as simple as possible.

The object of the invention is, therefore, to

provide a form of induction-coil in which the magnetizable portion is formed of thin plates of soft iron adapted to support the primary and secondary conductors in such manner that they shall be as nearly as possible surrounded by magnetic material, and shall be sodoeated that the currents traversing the primary shall be expended to the best advantage in magnetizing the iron, and that the magnetization and demagnetization of the iron shall 5 be utilized to the best advantage in establishing induced currents in the secondary coils.

The invention consists in constructing the core of the coil from thin plates of magnetic material, each provided with. one or more slots or narrow cuts for receiving the primary and secondary conductors. These plates are bolted together side by side with the openings for re ceiving the wire in alignment with each other but they are separated from each other by .5 washers or plates of non-magnetic material.

The coils of wire are wound in the openings formed in the plates, and are thus bounded upon both sides by soft iron.

In an application of even date herewith, Se-

Sezial No. 1511,4051. (No model.)

rial No. 191,406, there is described and claimed an inductorium in which primary and secondary conductors are wound in slots formed in soft-iron plates to form an annulus, and such construction is not, therefore, specifically claimed herein.

In the accompanying drawings, Figure l is a side elevation of an induction-coil construct ed upon this plan, and Fig. 2 is a transverse section of the same. lligs. I; and at are respectively similar views of a modified form.

tefcrring to the drawings, a a" a, i\ c., represent a series of plates of soft iron, which are fastened together side by side by bolts 1), I)", I), and I). These plates are separated by washers c, which intervene between the respective plates and prevent them from coming into contact with. each other. The bolts themselves are preferably surrotmded by sleeves or tubes of non conducting material, which prevent. them from coming in contact with the plates, and thereby placingtheni in magncticconnection with each other.

Illn the form shown in Figs. 1 and 2 each plate is constructed with two narrow slots, 6 and e, cut from the opposite ends, and when the plates are fastened toget herthe slots ein all the plates are in alignment, and likewise the slots 6". Against the ends of the series of plates there are placed blocks 1 and g", of wood or other suitable material, around which the wire is wound. One of the conductors-saythc primary conductor/" is wound through the slots and occupies about one-half the space in each slot. The secondary comluct'orf is then ap plied, being wound in like manner until the slots are entirely filled. It will be apparent that if the wire be of a thickness equal to the width of the slot, then but one line of convolutions will be tormcthand each wire will have magnetic material upon opposite sides.

The wire may be less in thickness than the width of the slots,and two or morelines of convolutions of either or both the primary and. the secondary conductors may thus be made. On the other hand,the primary and secondary conductors may be of different; sizes, so that.

there will be but one line of convolutions of one conductor and two or more of the other.

It is not necessary that the primary conductor should be inside and the secondary conductor outside; but the relative positions may be re versed, and they may be arranged in any wellknown manner relatively to each other. Still another modification is to make the outer portion of the slot wider than the inner, as shown in Fig. 4, and to employ in connection therewith any of the methods of winding which have been already mentioned; or a conductor of the width necessary to fill the narrower or inner portion may form one eoil,and athieker conductor filling the outer space be employed as the other conductor.

The form of induction-coil shown in Figs. 3 and 4 differs from that first described, in that each plate consists of onelialt' the plate shown in 2, and the series of plates are arranged in the circular form and held in place by two clamping-plates, K and K which are preferably of non-magnetic material. These plates are constructed with annular lugs k and It, which project into corresponding grooves or notches, in and k, formed in the edges of the plates. The inner ends of the plates may with advantage be separated by wedge shaped blocks m and m, of non-magnetic material. The plates being arranged in position,the two sup' porting plates K and K are secured together by a bolt, K. The wire is then wound circumferential] y in the slots or openings e e in the same manner as described with reference to Figs. 1 and 2.

I claim as my invention 1. An induction-coil consisting of a series of plates, each having one or more slots cut therein, and two coils of wire, constituting primary and secondary conductors, wound in said slots. 7

2. An induction-coil consisting of apriniary and a secondary coil, each wound in a single tier of convolutions, and magnetic material upon opposite sides of each series of convolutions.

3. The combination, substantially as hereinbefore set forth, of a series of plates of soft iron, each having a narrow slot formed therein,

"means for supporting said plates with the slots in alignment, and primary and secondary conductors wound in said slots, substantially as described.

4. The combination,substantially as herein before set forth, of a series of plates magnetically separated from each other, an opening or slot formed in each plate, the width of each opening being greater through its outer than through its inner portion, and primary and secondary conductors wound in said slots.

5. The combination,substantially as hereinbefore set forth, of an annular series of plates, each containing a narrow slot, means for supporting the plates, and primary and secondary conductors wound in said slots, and filling the same, substantially as described.

ln'testimony whereof I have hereunto subscribed my name this 28th day of January, A. D. 1886.

WVILLIAM STANLEY, J R.

Witnesses:

DANL. W. EDGEOOMB, CHARLES A. TERRY. 

